A request to create, delete, or modify a Photos collection list, for use in a photo library change block.
- iOS 8.0+
- tvOS 10.0+
You use the
PHCollection class to request changes for
PHCollection objects. To make changes to collection lists (such as folders containing user-created albums) in the Photos library, create a change request using the appropriate class method for the change you want to perform.
creationmethod to create a new asset collection.
Request For Collection List(with Title:)
deletemethod to delete existing asset collections.
Before creating a change request, use the
can method to verify that the collection allows the edit operation you’re requesting. If you attempt to perform an unsupported edit operation, Photos throws an exception.
A change request for creating or modifying a collection list works like a mutable version of the collection list object. Use the change request’s properties and instance methods to request changes to the collection list itself. For example, the following code removes an album from a folder:
After Photos runs the change block and calls your completion handler, the collection list’s state reflects the changes you requested in the block.
If you create or use a change request object outside a photo library change block, Photos raises an Objective-C exception. For details on change blocks, see